Accessing the subleading-twist B-meson light-cone distribution amplitude with large-momentum effective theory

Within the framework of large-momentum effective theory (LaMET), we propose a hard-collinear factorization formula to extract the subleading-twist <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mi>B</a:mi></a:math>-meson light-cone distribution amplitude (LCDA) from the quasidistribution amplitude calculated on the lattice. The one-loop matching coefficient and an integro-differential equation governing the evolution of the quasidistribution amplitude are derived. Our results could be useful either in evaluating the subleading-twist <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:mi>B</c:mi></c:math>-meson LCDA on the lattice or in the understanding the feasibility of LaMET on higher-twist distributions.